Drying can or cylinder.



No. 700,776. y Patented May 27, |902.

A. A. HUNTING.

DRYING CAN 0R CYLINDER.

(Application filed Aug. 5, 1901.)

5 Sheets-Sheet l.

(No Model.)

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No. 700,776. -Patnted may 27, |002. A. A. HuNImG.. nnvm'e cAN 00 00000050.

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(N0 Model.)

jive/fait No. 700,776. Patented May 27, |902.

. A. A. HUNTING.

DBYING GAN 0R CYLINDER.

(Application led Aug. 5, 1901.)

5 Sheets-Sheet 3.

(No Model.)

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No. 700,776. Patented May 27, |902.

A. A. HUNTING.

DRYING CAN 0R CYLINDER. (Application filed Ae'xg. 5, 1901.) (No Modal.) 5 Sheets-Sheet 4.

No. 700,776. Patented May 27, |902.

lA. A. HUNTING. DRYING CAN y0R CYLINDER.

(Applicationy led Aug. 5, 1901.) A

5.Sheets-Sheet 5 (No Model.)

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UNITED STATES PATENTv OFFICE.

ALFRED A. HUNTING, OE SALEM, MASSACHUSETTS.

DRYING CAN OR CYLINDER.

SPECIFICATION forming part of Letters Patent 1\To. 700,776, dated May 27, 1902.

Application filed August 5, 1901. Serial No. 70,915. (No model.)

. nying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to drying cylinders or cans, and is an improvement upon the drying can or cylinder shown and described in United States Patent No. 666,477, granted to me January 22, 1901.

The present invention has for its object to increase the efficiency of the drying cylinders or cans, such as shown and described in the patent referred to,l when said cylinders yor cans are made of substantially' large sizefor instance, from thirty inches in diameter` and upward. For this purpose I provide the hollow trunnion through which the water of condensation is discharged out of the can or cylinder with means to accelerate such discharge, and prefer to employ a spiral rib or web which will impart to the Water a rifle motion and force Yit out of the hollow trunnion at a speed sufficient to insure the substantially large volume of water in the large cylinder or can being discharged out therefrom. To further facilitate the discharge of the substantially large volume of water of condensation, I provide an unobstructed passage for the water from the spirally-arranged open gutter on the inner circumference of the can to the discharge-trunnion, which is obtained by making the reservoir intermediate the said gutter and the hollow trunnion curved, as will be described, so that as the water is carried into the said reservoir it follows the curved form of the latter and its current or flow is not impeded, obstructed, or checked on its Way to the discharge-trunnion. The spiral web isn arranged with relation to the outlet-mouth of the reservoir in such manner, as will be described, that the water is prevented or at least restrained from returning to the reservoir during each revolution of the drying can or cylinder. These and other features of this invention will be pointed out in the claims at the end of this specification.

Figure l is a front elevation with parts broken out of a drying can or cylinder embodying this invention; Fig. 2, an end elevation of the can shown in Fig. l; Fig. 3, a vertical section on the line 3 3, Fig. 2; Fig. 4, a cross-section on the line 4L 4., Fig. 3 Fig. 5, a cross-section of a modified form, and Fig. 6 a vertical section of a modification to bereferred to.

In Fig.'.l I have represented a substantially large drying can or cylinder, such as used in paper-mills. The cylinder or body a. in this case is made of cast-iron and is provided at its opposite ends with substantially large openings, which are closed by cast-iron heads b c, secured to the body a, as by bolts or screws CZ. The can or cylinder a has attached to its inner circumference ,a spirallyarranged open gutter e, extended from near the steam-inlet end of the can to the discharge end thereof, substantially as shown and described in the patent above referred to.

In large-size cans or cylinders having a diameter of thirty inches and upward the volume of Water of condensation picked up by the gutter e and conveyed into a reservoir f at the discharge end of the can isso great that opportunity is not afforded for this water to pass'out of the can or cylinder, especially when the latter is revolving at a high or substantially high speed, and as a result if the high speed is maintained the can in time is filled or substantially filled with water of condensation, thereby necessitating the slowing down of the machine, and consequently reducing the output of the machine.

The present invention has for its object to provide means whereby the water of condensation is discharged out of the can at such rate as to insure the can or cylinder being keptfree from water even when revolving at a high or substantially highv speed, thereby obtaining an efficient drying of a maximum quantity of material. For this purpose I provide the discharge-pipe g, extended from the reservoir f through the hollow trunnion h, With a spirally-arranged rib or web t', which imparts a riding motion to the Water in the discharge-pipe and accelerates its rate of discharge. The web or rib c' is arranged with relation to the outlet-mouth of the reservoir so as to extend partially across said mouth, as

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shown in Figs. 4 and 5, so that as the can is revolved in the direction indicated by arrow in Figs. 4 and 5 the water will be restrained i, in which the cylindrical body is made of sheet l metal and the heads are made of cast metal,

whereas in Figs. 1, 2, and 3 the can is made of cast metal.

In Fig. 5 the reservoir fis shown as provided with a pipe or nozzle j, which may be employed with the cans or Acylinders having sheet-metal heads, which are in this case provided with a cast trunnion.

I claim- 1. The combination with a drying can or cylinder provided with a hollow trunnion, of a reservoir communicating with said trunnion, a spirally-arranged open gutter or conductor on the inner side of the can or cylinder communicating with said reservoir, and means within said hollow trunnion for accelerating the discharge of Water of condensation, substantially as described.

2. The combination with a drying can or cylinder provided with a hollow trunnion, of a curved reservoir communicating with said trunnion, a spirally-arranged open gutter or conductor on the inner side of the can or cylinder communicating with said reservoir, and a spirally-arranged web or rib within said hollow trunnion, substantially as described.

3. The combination with a drying can or cylinder provided with a hollow trunnion, of a reservoir communicating with said trunnion, a spirally-arranged open gutter or conductor on the inner side of the can or cylinder communicating with said reservoir, and a web or rib within the hollow trunnion and 

